THE MINERALS OF THE CLYDE DRAINAGE AREA. 

 BY JOSEPH SOMMERVILLE AND G. R. THOMPSON. 



THIS list of minerals has been compiled from various sources, amongst 

 which may be mentioned The Mineralogical Magazine ; The Transactions of 

 the Royal Society of Edinburgh ; The " Memoirs of the Geological Survey 

 of Scotland"; The Transactions of the Edinburgh Geological Society ; and The 

 Transactions of the Geological Society of Glasgow. The classification with the 

 chemical formulae are based upon Dana's "System of Mineralogy," 1892. 

 A few of the more important local varieties are given, but synonyms have 

 been avoided as far as possible. A number of the better known ones are, 

 however, given in the alphabetical index witli a reference number to the 

 species to which they belong. 



NATIVE ELEMENTS. 



1. Diamond ? C Craigman. 



2. Graphite, C Craigman : Shotts : Hurlford. 



3. Gold, Au Leadhills : Wanlockhead : Ailsa Craig : 



M 'Plum's Cairn. 



4. Silver, Ag Campsie Hills : Corrie Glen : Enterkin : 



M'Phuu's Cairn. 



5. Copper, Cu Barrhe;id : Mauchline : Corrie Glen. 



6. Iron (Meteoric) Fe Fell at Fossil, near Glasgow, 5th April, 1804. 



SULPHIDES. 



7. Stibnite, Sb 2 S 3 Hare Hill : New Cumnock. 



8. Galena or Galenite, PbS Leadhills : Corrie Glen : Dockra. 



9. Chalcocite, Cu 2 S Ayrshire. 



10. Sphalerite or Blende, ZnS Wanlockhead : Strontian. 



11. Pentlandite, (Fe. Ni)S Inveraray. 



12. Greenockite, CdS Bishopton : Barrhead : Kilpatrick Hills. 



13. Millerite, NiS Dockra : Broadstone. 



14. Niccolite, NiAs Inveraray : Wanlockhead : Leadhills. 



15. Pyrrhotite, Fe n S 12 Loch Long : Appin. 



16. Inverarite of Heddle. Near Inveraray. 



Sulphide of Iron and Nickel.* 



17. Chalcopyrite, CuS. Co 2 S 3 Wanlockhead. 



18. Pyrite, FeS 2 Common in volcanic and derivative rocks" 



Dunoon : Leadhills. 



19. Smaltite, CoAs 2 Inveraray. 



20. Marcasite, FeS 2 Lanarkshire and Ayrshire coal-fields, common. 



21. Kermesite, Sb 2 S 2 O Hare Hill : New Cumnock. 



* Same as Pyrrhotite. 



